WO2023054608A1 - Système et procédé destinés à commander un engin de chantier - Google Patents

Système et procédé destinés à commander un engin de chantier Download PDF

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Publication number
WO2023054608A1
WO2023054608A1 PCT/JP2022/036498 JP2022036498W WO2023054608A1 WO 2023054608 A1 WO2023054608 A1 WO 2023054608A1 JP 2022036498 W JP2022036498 W JP 2022036498W WO 2023054608 A1 WO2023054608 A1 WO 2023054608A1
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WIPO (PCT)
Prior art keywords
attachment
bucket
axis
tilt
tiltrotator
Prior art date
Application number
PCT/JP2022/036498
Other languages
English (en)
Japanese (ja)
Inventor
光 鈴木
力 岩村
匠 野崎
竜二 神田
大司 岩永
友一 平尾
悠太 内田
佑基 島野
淳 佐々木
仁 北嶋
Original Assignee
株式会社小松製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小松製作所 filed Critical 株式会社小松製作所
Priority to CN202280055551.0A priority Critical patent/CN117795165A/zh
Priority to KR1020247004220A priority patent/KR20240028522A/ko
Priority to DE112022003139.5T priority patent/DE112022003139T5/de
Publication of WO2023054608A1 publication Critical patent/WO2023054608A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices
    • E02F9/264—Sensors and their calibration for indicating the position of the work tool
    • E02F9/265—Sensors and their calibration for indicating the position of the work tool with follow-up actions (e.g. control signals sent to actuate the work tool)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators

Definitions

  • the present disclosure relates to systems and methods for controlling work machines.
  • This application claims priority to Japanese Patent Application No. 2021-161376 filed in Japan on September 30, 2021, the content of which is incorporated herein.
  • Patent Document 1 discloses a technique for moving a bucket along a tilted design surface in a work machine equipped with a tilting bucket whose cutting edge angle can be tilted.
  • a tilt axis of the tilt bucket extends in the opening direction of the bucket.
  • Patent document 1 can automate the operation around the tilt axis, but does not disclose control of a work machine having a tilt rotator.
  • An object of the present disclosure is to provide a system and method capable of assisting operation of a work machine having an attachment supported by a support via a tiltrotator.
  • a system includes a support portion operably supported by a vehicle body, a tiltrotator attached to a tip of the support portion, and a cutting edge. and an attachment rotatably supported about three axes intersecting in different planes, the system comprising a processor.
  • a processor obtains measurements from multiple sensors.
  • the processor calculates the orientation of the attachment with respect to the vehicle body based on the measured values.
  • the processor determines a virtual axis of rotation based on the calculated orientation of the attachment.
  • the processor maintains the axial direction of the virtual rotation axis in the global coordinate system based on the calculated attitude of the attachment and the operation amount indicated by the operation signal for moving the support, and also maintains the design surface and the cutting edge of the attachment.
  • a tilt rotator control signal for rotating the attachment around the virtual rotation axis is generated so that the two approaches parallel, and the generated control signal is output.
  • the system can assist the operation of a work machine having an attachment supported by the support via the tiltrotator.
  • FIG. 1 is a schematic diagram showing the configuration of a working machine according to a first embodiment
  • FIG. It is a figure which shows the structure of the tilt rotator which concerns on 1st Embodiment. It is a figure which shows the drive system of the working machine which concerns on 1st Embodiment.
  • 1 is a schematic block diagram showing the configuration of a control device according to a first embodiment
  • FIG. 4 is a flowchart (part 1) showing intervention control of the working machine in the first embodiment
  • 4 is a flowchart (part 2) showing intervention control of the work machine in the first embodiment
  • 4 is a flow chart showing blade edge alignment control in the first embodiment.
  • 4 is a flowchart showing design surface follow-up control in the first embodiment
  • FIG. 1 is a schematic diagram showing the configuration of a working machine 100 according to the first embodiment.
  • a working machine 100 according to the first embodiment is, for example, a hydraulic excavator.
  • the working machine 100 includes a traveling body 120 , a revolving body 140 , a working machine 160 , an operator's cab 180 and a control device 200 .
  • the work machine 100 according to the first embodiment controls the cutting edge of the bucket 164 so as not to exceed the design surface.
  • Traveling body 120 supports work machine 100 so that it can travel.
  • the traveling body 120 is, for example, a pair of left and right endless tracks.
  • the revolving body 140 is supported by the traveling body 120 so as to be able to revolve around the revolving center.
  • the revolving body 140 is an example of a vehicle body.
  • the traveling body 120 is an example of a base that supports the revolving body 140 so as to be able to revolve.
  • Work implement 160 is operably supported by revolving body 140 .
  • Work implement 160 is hydraulically driven.
  • Work implement 160 includes boom 161, arm 162, tiltrotator 163, and bucket 164 as an attachment. A base end of the boom 161 is rotatably attached to the revolving body 140 .
  • a proximal end of the arm 162 is rotatably attached to a distal end of the boom 161 .
  • the tilt rotator 163 is rotatably attached to the tip of the arm 162 .
  • Bucket 164 is attached to tiltrotator 163 .
  • Bucket 164 is rotatably supported by tilt rotator 163 with respect to work implement 160 about three axes that intersect on different planes.
  • a portion of the revolving body 140 to which the work implement 160 is attached is referred to as a front portion.
  • the front portion is referred to as the rear portion
  • the left portion is referred to as the left portion
  • the right portion is referred to as the right portion.
  • Boom 161 and arm 162 are an example of a support section operably supported by revolving body 140 .
  • FIG. 2 is a diagram showing the configuration of the tiltrotator 163 according to the first embodiment.
  • a tiltrotator 163 is attached to the tip of the arm 162 so as to support the bucket 164 .
  • the tilt rotator 163 has a mounting portion 1631 , a tilt portion 1632 and a rotation portion 1633 .
  • the attachment portion 1631 is attached to the tip of the arm 162 so as to be rotatable about an axis extending in the horizontal direction of the drawing.
  • the tilt part 1632 is attached to the attachment part 1631 so as to be rotatable around an axis extending in the longitudinal direction of the drawing.
  • the rotating portion 1633 is attached to the tilt portion 1632 so as to be rotatable around an axis extending vertically in the drawing.
  • the rotation axes of the attachment portion 1631, the tilt portion 1632, and the rotation portion 1633 are orthogonal to each other.
  • a base end portion of the bucket 164 is fixed to the rotating portion 1633 .
  • the bucket 164 can rotate about three axes perpendicular to each other with respect to the arm 162 .
  • the rotation axes of the mounting portion 1631, the tilt portion 1632, and the rotation portion 1633 include design errors and may not necessarily be orthogonal.
  • the operator's cab 180 is provided in the front part of the revolving body 140 . Inside the operator's cab 180, an operation device 271 for an operator to operate the work machine 100 and a monitor device 272 as a man-machine interface of the control device 200 are provided.
  • the operation device 271 controls the amount of operation of the travel motor 304, the amount of operation of the swing motor 305, the amount of operation of the boom cylinder 306, the amount of operation of the arm cylinder 307, the amount of operation of the bucket cylinder 308, the amount of operation of the tilt cylinder 309, and the input of the operation amount of rotary motor 310 .
  • the operation device 271 outputs an operation signal indicating the amount of operation of the work machine.
  • the operation device 271 is operated by an operator and outputs operation signals for operating the boom 161 and the arm 162 .
  • the operation device 271 is operated by an operator and outputs an operation signal for causing the revolving body 140 to revolve with respect to the traveling body 120 .
  • the operation device 271 is operated by an operator and outputs an operation signal for operating the tiltrotator 163 .
  • the monitor device 272 accepts inputs for setting and canceling the bucket attitude holding mode from the operator.
  • the bucket attitude holding mode is a mode in which control device 200 automatically controls bucket cylinder 308, tilt cylinder 309, and rotary motor 310 to maintain the attitude of bucket 164 in the global coordinate system.
  • the monitor device 272 is realized by a computer having a touch panel, for example.
  • the control device 200 controls the traveling body 120, the revolving body 140, and the working machine 160 based on the operation of the operating device 271 by the operator.
  • the control device 200 is provided inside the cab 180, for example.
  • FIG. 3 is a diagram showing the drive system of the work machine 100 according to the first embodiment.
  • Work machine 100 includes a plurality of actuators for driving work machine 100 .
  • the work machine 100 includes an engine 301 , a hydraulic pump 302 , a control valve 303 , a pair of travel motors 304 , a swing motor 305 , a boom cylinder 306 , an arm cylinder 307 , a bucket cylinder 308 , a tilt cylinder 309 , a rotary motor 310 .
  • the work machine 100 includes an engine 301 , a hydraulic pump 302 , a control valve 303 , a pair of travel motors 304 , a swing motor 305 , a boom cylinder 306 , an arm cylinder 307 , a bucket cylinder 308 , a tilt cylinder 309 , a rotary motor 310 .
  • the engine 301 is a prime mover that drives the hydraulic pump 302 .
  • Hydraulic pump 302 is driven by engine 301 and supplies working oil to travel motor 304 , swing motor 305 , boom cylinder 306 , arm cylinder 307 and bucket cylinder 308 via control valve 303 .
  • Control valve 303 controls the flow rate of hydraulic oil supplied from hydraulic pump 302 to travel motor 304 , swing motor 305 , boom cylinder 306 , arm cylinder 307 and bucket cylinder 308 .
  • Traveling motor 304 is driven by hydraulic fluid supplied from hydraulic pump 302 to drive traveling body 120 .
  • the swing motor 305 is driven by hydraulic oil supplied from the hydraulic pump 302 to swing the swing body 140 with respect to the traveling body 120 .
  • Boom cylinder 306 is a hydraulic cylinder for driving boom 161 .
  • the base end of boom cylinder 306 is attached to rotating body 140 .
  • a tip of the boom cylinder 306 is attached to the boom 161 .
  • Arm cylinder 307 is a hydraulic cylinder for driving arm 162 .
  • a base end of the arm cylinder 307 is attached to the boom 161 .
  • a tip of the arm cylinder 307 is attached to the arm 162 .
  • Bucket cylinder 308 is a hydraulic cylinder for driving tiltrotator 163 and bucket 164 .
  • the proximal end of bucket cylinder 308 is attached to arm 162 .
  • a tip of the bucket cylinder 308 is attached to the tiltrotator 163 via a link member.
  • a tilt cylinder 309 is a hydraulic cylinder for driving the tilt section 1632 .
  • a proximal end portion of the tilt cylinder 309 is attached to the attachment portion 1631 .
  • a tip portion of the tilt cylinder 309 is attached to the tilt portion 1632 .
  • the rotary motor 310 is a hydraulic motor for driving the rotating portion 1633 .
  • the bracket and stator of rotary motor 310 are fixed to tilt section 1632 .
  • the rotary shaft and rotor of the rotary motor 310 are provided so as to extend vertically in the drawing and are fixed to the rotating portion 1633 .
  • Work machine 100 includes a plurality of sensors for measuring the attitude, orientation, and position of work machine 100 .
  • work machine 100 includes tilt measuring instrument 401 , position and heading measuring instrument 402 , boom angle sensor 403 , arm angle sensor 404 , bucket angle sensor 405 , tilt angle sensor 406 and rotation angle sensor 407 .
  • the tilt measuring instrument 401 measures the attitude of the revolving body 140 .
  • the tilt measuring device 401 measures the tilt (for example, roll angle, pitch angle and yaw angle) of the revolving superstructure 140 with respect to the horizontal plane.
  • An example of the tilt measuring instrument 401 is an IMU (Inertial Measurement Unit).
  • the tilt measuring device 401 measures the acceleration and angular velocity of the revolving structure 140, and calculates the tilt of the revolving structure 140 with respect to the horizontal plane based on the measurement results.
  • the tilt measuring instrument 401 is installed, for example, below the driver's cab 180 .
  • the inclination measuring device 401 outputs the posture data of the revolving structure 140 as measured values to the control device 200 .
  • the position and orientation measuring device 402 measures the position of the representative point of the revolving superstructure 140 and the direction in which the revolving superstructure 140 faces by GNSS (Global Navigation Satellite System).
  • Position and orientation measuring device 402 includes, for example, two GNSS antennas (not shown) attached to revolving body 140, and detects an orientation orthogonal to a straight line connecting the positions of the two antennas as the orientation of work machine 100.
  • Position and orientation measuring device 402 outputs position data and orientation data of revolving structure 140 , which are measured values, to control device 200 .
  • a boom angle sensor 403 measures the boom angle, which is the angle of the boom 161 with respect to the revolving body 140 .
  • Boom angle sensor 403 may be an IMU attached to boom 161 .
  • the boom angle sensor 403 measures the boom angle based on the tilt of the boom 161 with respect to the horizontal plane and the tilt of the revolving body measured by the tilt measuring device 401 .
  • the measured value of the boom angle sensor 403 indicates zero, for example, when the direction of a straight line passing through the base end and the tip end of the boom 161 coincides with the longitudinal direction of the revolving structure 140 .
  • the boom angle sensor 403 according to another embodiment may be a stroke sensor attached to the boom cylinder 306 .
  • the boom angle sensor 403 may be a rotation sensor provided on a joint shaft that rotatably connects the revolving body 140 and the boom 161 .
  • Boom angle sensor 403 outputs boom angle data, which is a measured value, to control device 200 .
  • the arm angle sensor 404 measures the arm angle, which is the angle of the arm 162 with respect to the boom 161.
  • Arm angle sensor 404 may be an IMU attached to arm 162 .
  • the arm angle sensor 404 measures the arm angle based on the tilt of the arm 162 with respect to the horizontal plane and the boom angle measured by the boom angle sensor 403 .
  • the measured value of the arm angle sensor 404 indicates zero when, for example, the direction of the straight line passing through the proximal end and the distal end of the arm 162 matches the direction of the straight line passing through the proximal end and the distal end of the boom 161 .
  • the arm angle sensor 404 may calculate the angle by attaching a stroke sensor to the arm cylinder 307 .
  • the arm angle sensor 404 may be a rotation sensor provided on a joint shaft that rotatably connects the boom 161 and the arm 162 .
  • Arm angle sensor 404 outputs arm angle data, which is a measured value, to control device 200 .
  • a bucket angle sensor 405 measures the bucket angle, which is the angle of the tiltrotator 163 with respect to the arm 162 .
  • Bucket angle sensor 405 may be a stroke sensor provided on bucket cylinder 308 .
  • the bucket angle sensor 405 measures the bucket angle based on the stroke amount of the bucket cylinder 308 .
  • the measured value of the bucket angle sensor 405 indicates zero, for example, when the direction of the straight line passing through the proximal end and the cutting edge of the bucket 164 matches the direction of the straight line passing through the proximal end and the distal end of the arm 162 .
  • the bucket angle sensor 405 may be a rotation sensor provided on a joint shaft that rotatably connects the arm 162 and the mounting portion 1631 of the tiltrotator 163 .
  • Bucket angle sensor 405 may also be an IMU attached to bucket 164 .
  • Bucket angle sensor 405 outputs bucket angle data, which is a measured value, to control device 200 .
  • the tilt angle sensor 406 measures the tilt angle, which is the angle of the tilt portion 1632 with respect to the mounting portion 1631 of the tilt rotator 163 .
  • the tilt angle sensor 406 may be a rotation sensor provided on a joint shaft that rotatably connects the attachment portion 1631 and the tilt portion 1632 .
  • the measured value of the tilt angle sensor 406 indicates zero when, for example, the rotation axis of the arm 162 and the rotation axis of the rotating portion 1633 are orthogonal.
  • the tilt angle sensor 406 may calculate the angle by attaching a stroke sensor to the tilt cylinder 309 .
  • Tilt angle sensor 406 outputs tilt angle data, which is a measured value, to control device 200 .
  • the rotation angle sensor 407 measures the rotation angle, which is the angle of the rotation portion 1633 with respect to the tilt portion 1632 of the tiltrotator 163 .
  • the rotation angle sensor 407 may be a rotation sensor provided on the rotary motor 310 .
  • the measured value of tilt angle sensor 406 indicates zero when, for example, the direction in which the blade edge of bucket 164 is directed and the plane of operation of work implement 160 are parallel.
  • Rotation angle sensor 407 outputs rotation angle data, which is a measured value, to control device 200 .
  • FIG. 4 is a schematic block diagram showing the configuration of the control device 200 according to the first embodiment.
  • the control device 200 is a computer that includes a processor 210 , main memory 230 , storage 250 and interface 270 .
  • Control device 200 is an example of a control system.
  • Control device 200 receives measurements from tilt measuring instrument 401 , position and heading measuring instrument 402 , boom angle sensor 403 , arm angle sensor 404 , bucket angle sensor 405 , tilt angle sensor 406 and rotation angle sensor 407 .
  • the storage 250 is a non-temporary tangible storage medium. Examples of the storage 250 include magnetic disks, optical disks, magneto-optical disks, semiconductor memories, and the like.
  • the storage 250 may be an internal medium directly connected to the bus of the control device 200, or an external medium connected to the control device 200 via the interface 270 or communication line.
  • An operating device 271 and a monitor device 272 are connected to the processor 210 via an interface 270 .
  • the storage 250 stores control programs for controlling the work machine 100.
  • the control program may be for realizing part of the functions that the control device 200 is caused to exhibit.
  • the control program may function in combination with another program already stored in the storage 250 or in combination with another program installed in another device.
  • the control device 200 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or instead of the above configuration.
  • PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, part or all of the functions implemented by the processor may be implemented by the integrated circuit.
  • the storage 250 records geometry data representing the dimensions and center-of-gravity positions of the revolving structure 140 , the boom 161 , the arm 162 and the bucket 164 .
  • Geometry data is data representing the position of an object in a predetermined coordinate system.
  • the storage 250 also records design plane data, which is three-dimensional data representing the shape of the design plane of the construction site in the global coordinate system.
  • the global coordinate system is a coordinate system composed of the Xg - axis extending in the latitude direction, the Yg - axis extending in the longitude direction, and the Zg - axis extending in the vertical direction.
  • the design plane data is represented by TIN (Triangular Irregular Networks) data, for example.
  • the processor 210 performs the operation signal acquisition unit 211, the input unit 212, the display control unit 213, the measured value acquisition unit 214, the position/orientation calculation unit 215, the intervention determination unit 216, the intervention control unit 217, the control A signal output unit 218 is provided.
  • the operation signal acquisition unit 211 acquires an operation signal indicating the operation amount of each actuator from the operation device 271 .
  • the input unit 212 receives operation inputs from the operator through the monitor device 272 .
  • the display control unit 213 outputs screen data to be displayed on the monitor device 272 to the monitor device 272 .
  • the measured value acquisition unit 214 acquires measured values from the tilt measuring device 401 , the position and heading measuring device 402 , the boom angle sensor 403 , the arm angle sensor 404 , the bucket angle sensor 405 , the tilt angle sensor 406 and the rotation angle sensor 407 .
  • the position/orientation calculation unit 215 calculates the position of the work machine 100 in the global coordinate system and the vehicle body coordinate system based on the various measurement values acquired by the measurement value acquisition unit 214 and the geometry data recorded in the storage 250 .
  • the position/posture calculation unit 215 calculates the position of the cutting edge of the bucket 164 in the global coordinate system and the vehicle body coordinate system.
  • the vehicle body coordinate system is an orthogonal coordinate system whose origin is a representative point of the revolving body 140 (for example, a point passing through the center of revolving). Calculations by the position/orientation calculation unit 215 will be described later.
  • the position/orientation calculator 215 is an example of an orientation calculator that calculates the orientation of the bucket 164 with respect to the revolving body 140 .
  • Intervention determination unit 216 determines whether to limit the speed of work implement 160 based on the positional relationship between the position of the cutting edge of bucket 164 calculated by position/orientation calculation unit 215 and the design surface indicated by the design surface data. .
  • the restriction of the speed of work implement 160 by control device 200 is also referred to as intervention control.
  • intervention determination unit 216 obtains the shortest distance between the design surface and bucket 164 , and determines that work implement 160 should be subjected to intervention control when the shortest distance is equal to or less than a predetermined distance.
  • the intervention control unit 217 controls the operation amount to be intervened among the operation amounts acquired by the operation signal acquisition unit 211 .
  • intervention control controls the amount of operation of boom 161 so that work implement 160 does not enter the design line.
  • the boom 161 operates so that the speed of the bucket 164 becomes a speed corresponding to the distance between the bucket 164 and the design line.
  • the intervention control unit 217 limits the speed of the cutting edge of the bucket 164 by raising the boom 161 according to the design surface when the operator operates the arm 162 to perform excavation work.
  • the control signal output unit 218 outputs the operation amount acquired by the operation signal acquisition unit 211 or the operation amount controlled by the intervention control unit 217 to the control valve 303 .
  • the position/orientation calculation unit 215 calculates the positions of the points of the outer shell based on the various measurement values acquired by the measurement value acquisition unit 214 and the geometry data recorded in the storage 250 .
  • Storage 250 records geometry data representing the dimensions of revolving structure 140, boom 161, arm 162, tiltrotator 163 (mounting portion 1631, tilting portion 1632 and rotating portion 1633), and bucket 164.
  • the geometry data of the revolving superstructure 140 indicates the center positions (x bm , y bm , z bm ) of the joint axes by which the revolving super structure 140 supports the boom 161 in the vehicle body coordinate system, which is the local coordinate system.
  • the vehicle body coordinate system is a coordinate system composed of the X sb axis extending in the front-rear direction, the Y sb axis extending in the left-right direction, and the Z sb axis extending in the up-down direction with reference to the turning center of the turning body 140 .
  • the vertical direction of the revolving body 140 does not necessarily match the vertical direction.
  • the geometry data of the boom 161 indicates the joint axis positions (x am , y am , z am ) at which the boom 161 supports the arm 162 in the boom coordinate system, which is the local coordinate system.
  • the boom coordinate system has an Xbm axis extending in the longitudinal direction, a Ybm axis extending in the direction in which the joint axis extends, and an Xbm axis and a Ybm axis, with reference to the central position of the joint axis connecting the revolving body 140 and the boom 161. is a coordinate system composed of the Zbm axis orthogonal to .
  • the geometry data of the arm 162 indicates the positions (x t1 , y t1 , z t1 ) of the joint axes at which the arm 162 supports the mounting portion 1631 of the tiltrotator 163 in the arm coordinate system, which is the local coordinate system.
  • the arm coordinate system is based on the center position of the joint axis connecting the boom 161 and the arm 162, the X am axis extending in the longitudinal direction, the Y am axis extending in the direction in which the joint axis extends, and the X am axis and the Yam axis. It is a coordinate system composed of orthogonal Z am axes.
  • the geometry data of the mounting portion 1631 of the tiltrotator 163 is the position (x t2 , y t2 , z t2 ) of the joint axis by which the mounting portion 1631 supports the tilt portion 1632 in the first tilt-rotate coordinate system, which is the local coordinate system.
  • the tilt of the joint axis ( ⁇ t ) is shown.
  • the inclination ⁇ t of the joint axis is an angle related to the design error of the tiltrotator 163 and is obtained by calibration of the tiltrotator 163 or the like.
  • the first tilt-rotate coordinate system is based on the central position of the joint axis connecting the arm 162 and the mounting portion 1631, the Yt1 axis extending in the direction in which the joint axis connecting the arm 162 and the mounting portion 1631 extends, and the mounting portion It is a coordinate system composed of the Zt1 axis extending in the direction in which the joint axis connecting 1631 and the tilt part 1632 extends, and the Xt1 axis perpendicular to the Yt1 axis and the Zt1 axis.
  • the geometry data of the tilt portion 1632 of the tiltrotator 163 is the tip position (x t3 , y t3 , z t3 ) of the rotary shaft of the rotary motor 310 and the inclination ( ⁇ r ).
  • the inclination ⁇ r of the rotation axis is an angle related to the design error of the tiltrotator 163 and is obtained by calibration of the tiltrotator 163 or the like.
  • the second tilt-rotate coordinate system is based on the central position of the joint axis connecting the mounting portion 1631 and the tilting portion 1632, and the Xt2 axis extending in the direction in which the joint shaft connecting the mounting portion 1631 and the tilting portion 1632 extends.
  • the geometry data of the rotating portion 1633 of the tiltrotator 163 indicates the center position (x t4 , y t4 , z t4 ) of the attachment surface of the bucket 164 in the third tilt-rotate coordinate system, which is the local coordinate system.
  • the third tilt-rotate coordinate system is composed of the Z t3- axis extending in the direction in which the rotation axis of the rotary motor 310 extends, and the X t3- axis and the Yt3 - axis orthogonal to the rotation axis, with the center position of the mounting surface of the bucket 164 as a reference. It is a coordinate system that The bucket 164 is attached to the rotating portion 1633 so that the cutting edge is parallel to the Yt3 axis.
  • the geometry data of bucket 164 indicates the locations (x bk , y bk , z bk ) of contour points of bucket 164 in the third tilt-rotate coordinate system.
  • contour points include the ends and center of the cutting edge of the bucket 164 , the ends and center of the bottom of the bucket 164 , and the ends and center of the butt of the bucket 164 .
  • the position/orientation calculation unit 215 converts the boom coordinate system to the vehicle body coordinate system using the following equation (1).
  • the boom-body transformation matrix T bm sb is rotated about the Y bm axis by the boom angle ⁇ bm and translated by the deviation (x bm , y bm , z bm ) between the origin of the body coordinate system and the origin of the boom coordinate system. is a matrix that
  • the position/orientation calculation unit 215 converts the arm coordinate system into the boom coordinate system using the following equation (2) based on the measurement value of the arm angle ⁇ am acquired by the measurement value acquisition unit 214 and the geometry data of the boom 161. Generate an arm-to-boom transformation matrix T am bm for The arm-boom transformation matrix T am bm is rotated about the Y am axis by the arm angle ⁇ am and translated by the deviation (x am , y am , z am ) between the origin of the boom coordinate system and the origin of the arm coordinate system.
  • the position/orientation calculation unit 215 obtains the product of the boom-body transformation matrix T bm sb and the arm-boom transformation matrix T am bm to obtain an arm-body transformation matrix for transforming from the arm coordinate system to the vehicle body coordinate system. Generate T am sb .
  • the position/orientation calculation unit 215 calculates arm coordinates from the first tilt-rotate coordinate system using the following equation (3). Generate a first tilt-to-arm transformation matrix T t1 am for transforming to the system.
  • the first tilt-arm transformation matrix T t1 am is rotated by the bucket angle ⁇ bk about the Y t1 axis, and the deviation between the origin of the arm coordinate system and the origin of the first tilt-rotate coordinate system (x t1 , y t1 , z t1 ), and further tilts the joint axis of the tilt unit 1632 by the tilt ⁇ t .
  • the position/orientation calculation unit 215 obtains the product of the arm-body transformation matrix T am sb and the first tilt-arm transformation matrix T t1 am to obtain a value for transforming from the first tilt-rotate coordinate system to the vehicle body coordinate system. Generate a first tilt-to-body transformation matrix T t1 sb .
  • the position/orientation calculation unit 215 calculates the first tilt-rotate coordinate system from the first tilt-rotate coordinate system using the following equation (4).
  • a second tilt-first tilt transformation matrix T t2 t1 for transformation to the two-tilt-rotate coordinate system is generated.
  • the second tilt-first tilt transformation matrix T t2 t1 is rotated by the tilt angle ⁇ t around the X t2 axis, and the deviation between the origin of the first tilt rotated coordinate system and the origin of the second tilt rotated coordinate system (x t2 , y t2 , z t2 ) and further tilted by the tilt ⁇ r of the rotation axis of the rotating unit 1633 . Further, the position/orientation calculation unit 215 obtains the product of the first tilt-to-vehicle transformation matrix T t1 sb and the second tilt-to-first tilt transformation matrix T t2 t1 , thereby shifting from the second tilt-rotate coordinate system to the vehicle body coordinate system. Generate a second tilt-to-body transformation matrix T t2 sb for transformation.
  • the position/orientation calculation unit 215 calculates the second tilt-rotate coordinate system from the second tilt-rotate coordinate system using the following equation (5).
  • a third tilt-second tilt transformation matrix T t3 t2 for transformation to the three-tilt-rotate coordinate system is generated.
  • the third tilt-second tilt transformation matrix T t3 t2 is rotated by the rotation angle ⁇ r about the Z t3 axis, and the deviation (x t3 , y t3 , z t3 ).
  • the position/orientation calculation unit 215 obtains the product of the second tilt-to-vehicle transformation matrix T t2 sb and the third tilt-to-second tilt transformation matrix T t3 t2 , thereby shifting from the third tilt-rotate coordinate system to the vehicle body coordinate system. Generate a third tilt-to-body transformation matrix T t3 sb for transformation.
  • the position/orientation calculation unit 215 calculates the center position (x t4 , y t4 , z t4 ) of the mounting surface of the bucket 164 and the positions (x bk , y bk , z bk ) and the third tilt-to-body transformation matrix T bk sb , the positions of contour points of the bucket 164 in the body coordinate system can be determined.
  • the angle of the cutting edge of bucket 164 with respect to the ground plane of work machine 100 that is, the angle formed by the X sb -Y sb plane of the vehicle body coordinate system and the Y t3 axis of the third tilt-rotate coordinate system is the boom angle ⁇ bm , the arm It is determined by the angle ⁇ am , bucket angle ⁇ bk , tilt angle ⁇ t and rotate angle ⁇ r . Therefore, as shown in FIG. 1 , the position/orientation calculation unit 215 identifies a bucket coordinate system whose starting point is the base end of the bucket 164 , that is, the central position of the mounting surface of the bucket 164 on the tiltrotator 163 .
  • the bucket coordinate system includes an X bk axis that extends in the direction in which the blade edge of bucket 164 faces, a Y bk axis that is orthogonal to the X bk axis and extends along the blade edge of bucket 164, and a Z bk axis that is orthogonal to the X bk axis and the Y bk axis.
  • It is a Cartesian coordinate system composed of axes.
  • the Xbk axis is also referred to as the bucket tilt axis
  • the Ybk axis as the bucket pitch axis
  • the Zbk axis as the bucket rotation axis.
  • the bucket tilt axis X bk , the bucket pitch axis Y bk and the bucket rotation axis Z bk are virtual axes and are different from the joint axes of the tiltrotator 163 . Note that when the tilt of the rotating shaft of the rotary motor 310 is zero, the bucket coordinate system and the third tilt-rotate coordinate system match.
  • the position/orientation calculation unit 215 calculates a bucket-third tilt conversion matrix T bk t3 for converting from the third tilt-rotate coordinate system to the bucket coordinate system using the following equation (6). Generate.
  • the bucket-third tilt transformation matrix T bk t3 is a matrix that rotates about the Y t3 axis by the inclination ⁇ r of the rotation axis.
  • control device 200 performs the following control at predetermined control intervals (for example, 1000 milliseconds).
  • the measured value acquiring unit 214 acquires measured values of the tilt measuring device 401, the position and heading measuring device 402, the boom angle sensor 403, the arm angle sensor 404, the bucket angle sensor 405, the tilt angle sensor 406, and the rotation angle sensor 407 (step S101).
  • the position/orientation calculation unit 215 calculates the positions of a plurality of contour points of the bucket 164 in the vehicle body coordinate system based on the measurement values acquired in step S101 (step S102). The position/orientation calculation unit 215 also calculates the orientation of the bucket in the vehicle body coordinate system based on the measurement values acquired in step S101 (step S103).
  • the posture of the bucket in the vehicle body coordinate system is represented by a posture matrix R cur that indicates the direction of each axis (X bk , Y bk , Z bk ) of the bucket coordinate system in the vehicle body coordinate system. All translation components of the attitude matrix R cur representing the attitude of the bucket 164 are set to zero.
  • the intervention determination unit 216 rotates and translates the design surface data recorded in the storage 250 based on the measured values of the tilt measuring device 401 and the position/orientation measuring device 402 acquired in step S101.
  • the position of the design surface represented by the coordinate system is transformed into the position of the vehicle body coordinate system (step S104).
  • Intervention determination unit 216 determines a plurality of contours of bucket 164 based on the positions of the plurality of contour points of bucket 164 in the vehicle body coordinate system calculated in step S102 and the position of the design surface in the vehicle body coordinate system converted in step S104. Among the points, the point closest to the design surface is specified as the control point (step S105).
  • the intervention determination unit 216 identifies a design surface (polygon) located vertically below the control point identified in step S105 in the design surface data (step S106).
  • the intervention determination unit 216 calculates a first design line that is a line of intersection between a plane parallel to the X bk -Z bk plane of the bucket coordinate system passing through the control point and the design plane identified in step S106 (step S107).
  • the intervention determination unit 216 also calculates a second design line, which is a line of intersection between the design plane and a plane parallel to the Y bk -Z bk plane of the bucket coordinate system passing through the control point (step S108).
  • the intervention determination unit 216 determines whether or not the distance between the control point and the first design line is equal to or less than the intervention threshold (step S109). If the distance between the control point and the first design line is equal to or less than the intervention threshold (step S109: YES), the intervention determination unit 216 detects the boom based on the operation signal from the operation device 271 acquired by the operation signal acquisition unit 211. It is determined whether or not an operation other than 161 has been received (step S110). If the intervention determination unit 216 determines that only the operation of the boom 161 has been accepted, or if it determines that the operation has not been accepted (step S110: NO), the operator intends to approach the design surface of the blade edge of the bucket 164. Therefore, the intervention control unit 217 generates control signals for the bucket cylinder 308, the tilt cylinder 309, and the rotary motor 310 by performing blade edge alignment control, which will be described later (step S111).
  • step S110 determines that an operation other than the boom 161 has been received (step S110: YES)
  • the intervention determination unit 216 operates based on the operation signal from the operation device 271 acquired by the operation signal acquisition unit 211. , swing motor 305 and arm 162 is determined (step S112).
  • step S112 determines that no operation other than the turning motor 305 and the arm 162 is accepted (step S112: NO)
  • the intervention control unit 217 generates control signals for the bucket cylinder 308, the tilt cylinder 309, and the rotary motor 310 by performing design surface follow-up control, which will be described later (step S113).
  • the intervention control unit 217 adjusts the cutting edge of the bucket 164 based on the distance between the control point and the first design line and a predetermined speed limit table. is specified (step S114).
  • the speed limit table is a function showing the relationship between the distance between the cutting edge and the design line and the speed limit of the cutting edge, and the shorter the distance, the smaller the speed limit.
  • the intervention control unit 217 determines whether or not the speed of the cutting edge exceeds the speed limit specified in step S114 (step S115).
  • step S115 If the speed of the cutting edge exceeds the speed limit (step S115: YES), the intervention control unit 217 calculates the speed of the boom 161 for matching the speed of the cutting edge with the speed limit, and generates a control signal for the boom cylinder 306. (Step S116). If the speed of the cutting edge does not exceed the speed limit (step S115: NO), the intervention control unit 217 does not perform intervention control for the boom cylinder 306.
  • control signal output unit 218 generates a control signal according to the operation amount indicated by the operation signal from the operation device 271 acquired by the operation signal acquisition unit 211 for the actuators for which the intervention control unit 217 has generated no control signal. , and outputs control signals for each actuator to the control valve 303 (step S117).
  • FIG. 7 is a flowchart showing blade edge alignment control in the first embodiment.
  • the blade edge alignment control is a control that brings the blade edge of the bucket 164 and the design surface closer to parallel. Specifically, the blade edge alignment control determines the bucket tilt axis X bk extending in the direction in which the blade edge of the bucket 164 faces as a virtual rotation axis, and rotates the blade along the blade edge of the bucket 164 and perpendicular to the bucket tilt axis X bk .
  • This control is to operate at least one of the bucket cylinder 308, the tilt cylinder 309 and the rotary motor 310 so that the extending bucket pitch axis Ybk and the design plane are nearly parallel.
  • the intervention control unit 217 maintains the angle about the bucket pitch axis Ybk and the angle about the bucket rotation axis Zbk in the bucket coordinate system, and adjusts the cutting edge of the bucket 164 and the second design line to be parallel to each other.
  • a target value ⁇ bk — tgt of the bucket angle, a target value ⁇ t_tgt of the tilt angle, and a target value ⁇ r_tgt of the rotation angle are obtained.
  • the intervention control unit 217 obtains the target values of the bucket angle ⁇ bk , the tilt angle ⁇ t , and the rotation angle ⁇ r in the following procedure.
  • the intervention control unit 217 calculates the angular velocity about the bucket tilt axis Xbk based on the angle formed by the bucket pitch axis Ybk of the bucket coordinate system and the second design line obtained in step S108 and a predetermined bucket tilt table. is determined (step S301).
  • the angular velocity target value ⁇ bk_t_tgt is represented by a rotation angle per unit time.
  • the bucket tilt table is a function showing the relationship between the angle formed by the bucket pitch axis Ybk and the design line and the angular velocity around the bucket tilt axis Xbk , and the smaller the angle, the smaller the angular velocity.
  • the intervention control unit 217 creates a rotation matrix R bk_t bk in the bucket coordinate system representing the target value ⁇ bk_t_tgt of the angular velocity according to the following equation (7) (step S302).
  • the intervention control unit 217 calculates the target attitude R tgt of the bucket 164 after a unit time by multiplying the matrix R cur representing the current attitude of the bucket 164 calculated in step S103 by the rotation matrix R bk_t bk (step S303). Intervention control unit 217 calculates bucket angle ⁇ bk , tilt angle ⁇ t and A target value for the rotation angle ⁇ r is obtained (step S304).
  • the intervention control unit 217 calculates the angular velocities ⁇ bk_tgt , ⁇ t_tgt , and ⁇ r_tgt to offset the difference between the current attitude R cur of the bucket 164 and the target attitude R tgt of the bucket 164 . can be asked for. Intervention control unit 217 generates control signals for bucket cylinder 308, tilt cylinder 309, and rotary motor 310 based on the target value of the angular velocity obtained in step S304 (step S305).
  • FIG. 8 is a flowchart showing design surface follow-up control in the first embodiment.
  • the design surface follow-up control is a control that causes the cutting edge of the bucket 164 to follow the design surface during excavation or leveling work. Specifically, the design surface follow-up control determines the bucket tilt axis Xbk extending in the direction in which the cutting edge of the bucket 164 faces as a virtual rotation axis, and holds the axial direction of the bucket tilt axis Xbk in the global coordinate system.
  • At least one of the bucket cylinder 308, the tilt cylinder 309 , and the rotary motor 310 is arranged so that the bucket pitch axis Ybk , which is orthogonal to the bucket tilt axis Xbk and extends along the cutting edge of the bucket 164, and the design surface are nearly parallel to each other. is the control that activates the In the design surface follow-up control, the bucket 164 is rotated around the bucket tilt axis Xbk while maintaining the axial direction of the bucket tilt axis Xbk in the global coordinate system.
  • intervention control unit 217 cancels the change in the opening direction with respect to the global coordinate system due to the operation of work machine 100 by the operator, and rotates around bucket tilt axis Xbk to make the cutting edge of bucket 164 parallel to the second design line.
  • a target bucket angle value ⁇ bk — tgt , a target tilt angle value ⁇ t — tgt, and a target rotation angle value ⁇ r — tgt are obtained.
  • the intervention control unit 217 obtains the target values of the bucket angle ⁇ bk , the tilt angle ⁇ t , and the rotation angle ⁇ r in the following procedure.
  • the intervention control unit 217 calculates in step S103 based on the operation amount of the turning motor 305 and the arm cylinder 307 acquired by the operation signal acquiring unit 211 and the measured value of the tilt measuring device 401 acquired by the measured value acquiring unit 214. By rotating the matrix representing the current attitude of the bucket 164, an attitude matrix R_man representing the attitude of the bucket 164 after a unit time (control cycle) is obtained (step S401).
  • the intervention control unit 217 adjusts the bucket tilt axis X bk based on the angle formed by the bucket pitch axis Y bk of the bucket coordinate system and the second design line obtained in step S108 and a predetermined bucket tilt table.
  • a target value ⁇ bk_t_tgt of the angular velocity of rotation is determined (step S402).
  • the intervention control unit 217 creates a rotation matrix R bk_t bk in the bucket coordinate system that expresses the target angular velocity value ⁇ bk_t_tgt by Equation (7) (step S403).
  • the intervention control unit 217 multiplies the attitude matrix R man representing the attitude of the bucket 164 after the unit time (control period) calculated in step S401 by the rotation matrix R bk_t bk , thereby obtaining the desired attitude of the bucket 164 after the unit time.
  • R_tgt is calculated (step S404).
  • Intervention control unit 217 obtains target values of bucket angle ⁇ bk , tilt angle ⁇ t , and rotation angle ⁇ r using equations (11) to (13) based on posture matrix R man and target posture R tgt (step S405).
  • the intervention control unit 217 sets the angular velocities ⁇ bk_tgt , ⁇ t_tgt , and ⁇ r_tgt to offset the difference between the current attitude R cur of the bucket 164 and the target attitude R tgt of the bucket 164 . can be asked for. Intervention control unit 217 generates control signals for bucket cylinder 308, tilt cylinder 309, and rotary motor 310 based on the target value of the angular velocity obtained in step S405 (step S406).
  • the control device 200 controls the tiltrotator 163 so that the cutting edge of the bucket 164 is parallel to the design surface. .
  • the control device 200 controls the tilt rotator 163 to rotate around the bucket tilt axis in the bucket coordinate system so that the direction in which the cutting edge of the bucket 164 faces does not change.
  • the control device 200 can align the cutting edge with the design surface while reflecting the operator's will.
  • control device 200 causes the edge of bucket 164 to align with the design surface.
  • the tiltrotator 163 is controlled to follow.
  • the control device 200 performs control so that the direction in which the cutting edge of the bucket 164 faces does not change when viewed from the global coordinate system even if the revolving body 140 is revolved by the operator's operation. As a result, the control device 200 can automatically keep the cutting edge pointing in the excavating direction.
  • the attitude of the bucket 164 as viewed from the global coordinate system is kept constant even when the swinging body 140, the boom 161 and the arm 162 are operated by setting the posture holding mode by the operator. be able to.
  • the cutting edge can be easily kept pointing in the excavation direction.
  • an attachment such as a grapple is attached to the work machine 160 instead of the bucket 164 to move the load, by maintaining the attitude of the attachment, it is possible to suppress the load from dropping due to the change in attitude.
  • the control device 200 causes the intervention control unit 217 to operate the tiltrotator. does not generate a control signal for If the operator has input an operation signal for operating the tilt rotator 163, it is highly likely that the operator has a desire to operate the direction in which the bucket 164 faces. Therefore, in such a case, the control device 200 does not generate a control signal for the tiltrotator, so that the operator's operation is not hindered.
  • control device 200 may be configured by a single computer, or the configuration of the control device 200 may be divided into a plurality of computers, and the plurality of computers may cooperate with each other. may function as the control device 200. At this time, some of the computers constituting control device 200 may be mounted inside the work machine, and other computers may be provided outside the work machine.
  • the operation device 271 and the monitor device 272 are provided remotely from the work machine 100, and the configuration other than the measurement value acquisition unit 214 and the control signal output unit 218 of the control device 200 is provided in a remote server. may be
  • the work machine 100 according to the above-described embodiment is a hydraulic excavator, it is not limited to this.
  • the work machine 100 according to another embodiment may be a work machine fixed on the ground and not self-propelled.
  • the working machine 100 according to another embodiment may be a working machine that does not have a revolving body.
  • Work machine 100 includes bucket 164 as an attachment for work machine 160, but is not limited to this.
  • work machine 100 may include a breaker, a fork, a grapple, etc. as attachments.
  • the control device 200 has the X bk axis extending in the direction in which the blade edge of the attachment faces, the Y bk axis extending in the direction along the blade edge, and the Z bk axis orthogonal to the X bk axis and the Y bk axis.
  • the tilt rotator 163 is controlled by a local coordinate system consisting of .
  • the axes of the tiltrotator 163 do not have to be orthogonal as long as they intersect on different planes.
  • the axis AX1 related to the joint shaft connecting the arm 162 and the mounting portion 1631 the axis AX2 related to the joint shaft connecting the mounting portion 1631 and the tilt portion 1632, and the rotation axis AX3 of the rotary motor 310.
  • a plane parallel to the axes AX1 and AX2 a plane parallel to the axes AX2 and AX3, and a plane parallel to the axes AX3 and AX1 are:
  • Each may be different.
  • control device 200 may not have a design setting function.
  • control device 200 can automatically control the tiltrotator 163 by performing bucket attitude retention control. For example, the operator can carry out simple leveling work without setting a design surface.
  • the system can assist the operation of a work machine having an attachment supported by the support via the tiltrotator.
  • Control device 210 ... processor 211 ... operation signal acquisition section 212 ... input section 213 ... display control section 214 ... measurement value acquisition section 215 ... position and orientation calculation section 216 ... intervention determination section 217 ... intervention control section 218 ... control signal output section 230 ...
  • main memory 250 Storage 270 Interface 271 Operation device 272 Monitor device 301
  • Control valve 304 Travel motor 305 Swing motor 306
  • Boom cylinder 307 Arm cylinder 308
  • Bucket cylinder 309 Tilt cylinder 310
  • Rotary motor 401 Inclination measuring instrument 402... Position and bearing measuring instrument 403...
  • Boom angle sensor 404 ... Arm angle sensor 405... Bucket angle sensor 406... Tilt angle sensor 407... Rotation angle sensor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Shovels (AREA)

Abstract

Selon l'invention, une partie acquisition de valeurs de mesure acquiert des valeurs de mesure provenant d'une pluralité de capteurs. Une partie calcul de posture calcule la posture d'un équipement par rapport à un corps de véhicule sur la base des valeurs de mesure. Une partie commande d'intervention détermine un axe de rotation virtuel sur la base de la posture dudit équipement ainsi calculée. Une partie acquisition de signal d'opération acquiert un signal d'opération destiné à mettre en action une partie support à partir d'un dispositif d'opération. La partie commande d'intervention maintient la direction axiale de l'axe de rotation virtuel dans un système de coordonnées global, sur la base de la posture de l'équipement calculée et d'une quantité d'opération indiquant le signal d'opération destiné à mettre en action ladite partie support, et génère un signal de commande d'un rotateur d'inclinaison destiné à mettre en rotation l'équipement autour de l'axe de rotation virtuel afin qu'une surface de conception et un bord tranchant dudit équipement se rapprochent parallèlement. Une partie sortie émet en sortie le signal de commande ainsi généré.
PCT/JP2022/036498 2021-09-30 2022-09-29 Système et procédé destinés à commander un engin de chantier WO2023054608A1 (fr)

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CN202280055551.0A CN117795165A (zh) 2021-09-30 2022-09-29 用于控制作业机械的系统以及方法
KR1020247004220A KR20240028522A (ko) 2021-09-30 2022-09-29 작업 기계를 제어하기 위한 시스템 및 방법
DE112022003139.5T DE112022003139T5 (de) 2021-09-30 2022-09-29 System und Verfahren zur Steuerung einer Arbeitsmaschine

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JP2020125599A (ja) * 2019-02-01 2020-08-20 株式会社小松製作所 建設機械の制御システム、建設機械、及び建設機械の制御方法
JP2021085216A (ja) * 2019-11-27 2021-06-03 株式会社小松製作所 作業機械の制御システム、作業機械、作業機械の制御方法
JP2021134631A (ja) * 2020-02-28 2021-09-13 日立建機株式会社 作業機械

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JP6099834B1 (ja) 2016-05-31 2017-03-22 株式会社小松製作所 建設機械の制御システム、建設機械、及び建設機械の制御方法
JP2021161376A (ja) 2020-03-30 2021-10-11 株式会社カネカ 重合体微粒子およびその利用

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020125599A (ja) * 2019-02-01 2020-08-20 株式会社小松製作所 建設機械の制御システム、建設機械、及び建設機械の制御方法
JP2021085216A (ja) * 2019-11-27 2021-06-03 株式会社小松製作所 作業機械の制御システム、作業機械、作業機械の制御方法
JP2021134631A (ja) * 2020-02-28 2021-09-13 日立建機株式会社 作業機械

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